# A148998 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 9
4 33
5 127
6 479
7 1987
8 8153
9 34531
10 149741
11 647735
12 2870859
13 12757149
14 57208157
15 259286825
16 1176744359
17 5390834697
18 24773267651
19 114338291417
20 530595471509
21 2466705308701
22 11521350667943
23 53941366645455
24 253217223758335
25 1192447189901931
26 5624336512312905
27 26601547030729237